Dredge bucket



W. H. sTlRl-:s

DREDGE BUCKET Dec. s, 1936.

FiledDeC. 18, 1934 Psa-nad Dees', 193s UNITED' STATES! 'PATENT OFFICE' l Claim. (Cl. 37-14U My invention relates to dredge bucket and lip assemblies and provides novel and simple means for seating the lip in interlocking relation with the bucket so that it may be applied or removed with facility and dispatch. v

More specincally stated, the invention provides certain improvements in swingingly mounted lips of the type set forth in my LettersPatent No. 1,984,322 whereby the seating of the lip is externally of the bucket and has no parts prot jecting inside the bucket likely to catch or trap spoil. v Otherwise stated, the object ts to provide for swinging the lip externally oi the bucket so that it will constitute an extension flush with the inside of the bucket. 'The external seating of the bucket has the further merit that it ov'ercomes certain foundry dimculties, particularly the saving of va lot of contour grinding in that the respective seating portions are finished in a substantially common plane. Furthermore, the new assembly has the further 'merit that by swinging the lip externally of the bucket, the capacity of the latter is considerably augmented.

The nature, characteristic features and scope of the invention more readily will be understood from the following detailed description taken in connection with the accompanying drawing, forming a part hereof, wherein:-

' Figure l is a central vertical section of a dredge bucket and lip assembly embodying my improvements.

Fig. 2 is a section on-line 2 2, of Fig. l. Fig. 3 is a sectional detail of the front lock, and Fig. 41s a section on line 4-4 of Fig. 1.

According to the invention the dredge bucket l isvprovided with a rim seati to accommodate the shouldered portion 'I of a lip I. and at the front and on the sides there are abutments I and il formed with open slots or channeled portions il to accommodate a continuous skirt or apron extension i2 of the lip. It will be noted that the abutting surfaces `of the rim seat and the seating shoulder of the lip are finished in a 5 substantially common plane. 'I'he purpose and effect of this is to simplify grinding and to insure a flush joint between the lip and the rim so that for all practical purposes the medial portion of the lip is a prolongation of the smooth flaring 10 bowl. y'Ilie skirt of the lip terminates rearwardly in crook-like arms Il which are upwardly directed and are designed to engage bosses il on the wall of the bucket and below its rim seat. The boss and lip relationship stated is useful because it l5 facilitates the application of the lip and because it serves to lock the ends of the lip through the intervention of theheaded extremities II of the bosses The front lock may be of any approved type 20 l notwithstanding that I prefer the lock shown in Fig. 3, raccording to which a forked member il on the lip is adapted to cooperate with a lug I1 on the front abutment 3, the parts having registered openings to accommodate a wedge fasten- 25 i118` il.

Having described the invention, I claim:-

A Vdredge bucket having an uninterrupted smooth inner surface terminating in a rim whose edge wall dennes a lip seat. a lip having a medial 30 shouldered portiony which nts the rim seat and having an outside lapping portion, means exter-- nally of the bucket and engaging the lappingl portion of the lip to take the thrust thereof, bosses formed externally of the bucket and the lip hav- 35 ing trailing ends adapted and arranged for swingingly engaging said bosses.

WILLIAM H. STIRIS. 

